Interlaboratory evaluation of cellulosic acid-soluble internal air sampling capsules for multi-element analysis

Andrews, Ronnee N.; Feng, H. Amy; Ashley, Kevin

doi:10.1080/15459624.2015.1072635

Cited by 5 publications

(3 citation statements)

References 8 publications

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“…In another set of experiments, 37-mm diameter cellulosic sampler inserts consisting of MCE filters melded to cellulose acetate housings (for insertion into 37-mm air-sampling cassettes: Solu-Serts) 28 were tested. The Solu-Serts were spiked using pre-determined quantities of NH 4 HF 2 solutions containing soluble beryllium and dried.…”

Section: Resultsmentioning

confidence: 99%

Optical molecular fluorescence determination of ultra-trace beryllium in occupational and environmental samples using highly alkaline conditions

Adams¹,

Agrawal²,

Cronin³

et al. 2017

International Journal of Environmental Analytical Chemistry

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Exposures to beryllium (Be), even at extremely low levels, can cause severe health effects in a percentage of those exposed; consequently, occupational exposure limits (OELs) promulgated for this element are the lowest established for any element. This work describes the advantages of using highly alkaline dye solutions for determination of Be in occupational hygiene and environmental samples by means of an optical molecular fluorescence technique after sample extraction in 1–3% (w˖w−1) aqueous ammonium bifluoride (NH4HF2). Improved attributes include the ability to further enhance the detection limits of Be in extraction solutions of high acidity with minimal dilution, which is particularly beneficial when NH4HF2 solutions of higher concentration are used for extraction of Be from soil samples. Significant improvements in Be method detection limits (MDLs) are obtained at levels many-fold below those reported previously for this methodology. Notably, MDLs for Be of <0.01 ng l−1 / 0.1 ng per sample have been attained, which are superior to MDLs routinely reported for this element by means of the most widely used ultra-trace elemental measurement technique, inductively coupled plasma mass spectrometry (ICP-MS). Very low MDLs for Be are essential in consideration of reductions in OELs for this element in workplace air by health organizations and regulatory agencies in the USA and internationally. Applications of enhanced Be measurements to air filter samples, surface wipe samples, soils and newly-designed occupational air sampler inserts are illustrated.

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Section: Resultsmentioning

confidence: 99%

Optical molecular fluorescence determination of ultra-trace beryllium in occupational and environmental samples using highly alkaline conditions

Adams¹,

Agrawal²,

Cronin³

et al. 2017

International Journal of Environmental Analytical Chemistry

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“…This was tested in bakeries with identical gravimetric results for side-by-side DIS and IOM samplers [52]. Cellulose acetate inserts with MCE filters have been extensively tested [30,[53][54][55] and are intended for acid digestion and subsequent analysis for metals in NIOSH Method 7306 [56]. Commercially available products include Solu-Serts™ (Zefon International, Inc.) and Solu-CAPs™ (SKC Inc., Eighty Four, PA, USA).…”

Section: Maximum Wall Depositmentioning

confidence: 99%

Recent Advances in Occupational Exposure Assessment of Aerosols

Harper

2020

IJERPH

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Exposure science is underpinned by characterization (measurement) of exposures. In this article, six recent advances in exposure characterization by sampling and analysis are reviewed as tools in the occupational exposure assessment of aerosols. Three advances discussed in detail are (1) recognition and inclusion of sampler wall deposits; (2) development of a new sampling and analytical procedure for respirable crystalline silica that allows non-destructive field analysis at the end of the sampling period; and (3) development of a new sampler to collect the portion of sub-300 nm aerodynamic diameter particles that would deposit in human airways. Three additional developments are described briefly: (4) a size-selective aerosol sampler that allows the collection of multiple physiologically-relevant size fractions; (5) a miniaturized pump and versatile sampling head to meet multiple size-selective sampling criteria; and (6) a novel method of sampling bioaerosols including viruses while maintaining viability. These recent developments are placed in the context of the historical evolution in sampling and analytical developments from 1900 to the present day. While these are not the only advances in exposure characterization, or exposure assessment techniques, they provide an illustration of how technological advances are adding more tools to our toolkit. The review concludes with a number of recommended areas for future research, including expansion of real-time and end-of-shift on-site measurement, development of samplers that operate at higher flow-rates to ensure measurement at lowered limit values, and development of procedures that accurately distinguish aerosol and vapor phases of semi-volatile substances.

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“…In addition, problems originating from particle deposition on the interior walls of sampler have been raised by various researchers (Demage et al 1990; Ashley and Harper 2013; Harper and Ashley 2013; Andrews et al 2016; Lee et al, 2014). Sample analysis solely depending on the filter, (i.e.…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of disposable inhalable aerosol sampler at a copper electrorefinery

Lee

Grimson

Chisholm

et al. 2019

Journal of Occupational and Environmental Hygiene

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The performance of the disposable inhalable aerosol sampler (DIAS), newly developed to be cost-effective and comparable to the inhalable particle sampling convention, was evaluated. Forty-eight sets of copper exposure measurements (23 personal and 25 area) with pairs of the DIAS prototypes and the IOM inhalable samplers were collected at an electrorefinery facility. For the combined data (personal and area), the geometric mean (GM) concentrations of copper were 36.1 μg m−3 (range of 0.8 – 337.7 μg m−3) for the DIAS prototype and 26.5 μg m−3 (range of 5.1 – 760.8 μg m−3) for the IOM sampler. The GM ratio of exposure measurements (DIAS/IOM) was 1.4 revealing ~ 81% of the ratios greater than the unit ratio. The concordance correlation coefficient tests revealed significant disagreement between the two types of samplers and suggested precision as the source of the disagreement. For the personal, area and combined data, no linear relationships were observed between the DIAS and IOM (all p-values < 0.05). In addition, the estimated average concentrations were always higher for the DIAS compared to the IOM for the combined and area exposure data (p-values < 0.05) and comparable for the personal exposure data (p-value = 0.487). Overall, regardless of the sampling method (i.e., personal and area), the DIAS generated higher exposure measurements compared to the IOM sampler. The present study is limited to one metal component (copper) of the dust at a worksite. As far as we are concerned, this is only the second field evaluation of the DIAS. Thus, it is too early to draw a firm conclusion about the performance of the DIAS vis-à-vis the inhalable convention. Additional field evaluations covering various chemicals and worksites will be necessary. In addition, particle losses on the cap during transportation of collected samples to a laboratory were observed for both sampler types. Occupational professionals should be aware of potential errors caused from transferring samples from a field to a laboratory and should be careful not to exclude particles collected on the caps.

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Interlaboratory evaluation of cellulosic acid-soluble internal air sampling capsules for multi-element analysis

Cited by 5 publications

References 8 publications

Optical molecular fluorescence determination of ultra-trace beryllium in occupational and environmental samples using highly alkaline conditions

Optical molecular fluorescence determination of ultra-trace beryllium in occupational and environmental samples using highly alkaline conditions

Recent Advances in Occupational Exposure Assessment of Aerosols

Performance evaluation of disposable inhalable aerosol sampler at a copper electrorefinery

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